These passwords can be retrieved from a live system running one of the vulnerable products. Below is assembly language source code for building such a tool. NASM (free) can be used to build your copy of the tool from the source below.

welcome db ”,10,13
db ‘Dumping password to file : PASSLEAK.TXT’,10,13
db ‘Look in PASSLEAK.TXT to see what was found in your BIOS keyboard buffer.’,10,13
db ‘This is a circular buffer, so your password might wrap around to the front.’,10,13
db ‘It should have the last 16 printable characters typed at the login screen.’,10,13
db ‘$’,10,13